Transformer-casing.



E. G. REED.

TRANSFORMER CASING. I

APPLICATION FILED NOV. 5, 1913. RENEWED JAN. 11,1915.

1,156,708. Patented 001.12, 1915.

WITNESSES: 4 9mv TOR W ATTORNEY 45 I member and a cast iron portion of a casmg UNITED STATES PATEN T OFFICE.

EMERSON G. REED," o WILKINsBuRG, rENNsYLvANIA, ASSIGNOR TO wEsrINGnoUsE ELECTRIC AND AN FACTURING COMPANY; A CORPORATION or PENNSYLVANIA.

TRANSFORMER-CASING.

Patented ct."12, 1915.

Application filed Noven'lberv 5, 1918, Serial No. 799,275. Renewed January 11, 1915. Serial No. 1,568.

To all whom it may concern:

Be it known that I, EMERSON G. RE D, a citizen of the United States, and a resident of Wilkinsburg, in the county of Allegheny 0' and State of Pennsylvania, have invented a new and useful Improvement in Transformer-Casings, of which the following is a specification.

My invention relates to inclosing cases in which it is essential to have tightjoints, and it has special reference to cases or tanks in which electrical apparatus immersed in a cooling or insulating fluid may be contained.

One object of my invention is to provide a simple and Cheap casing of such construction as to insure adequate heat radiation and circulation of the immersing fluid, in addition, to preclude the; development of leaks resulting from-faulty joints.

It is usual to construct tanks of this char- I acter'having main body portions of sheet metal to which are cast base and crown portions. Longitudinally extending tubes are disposed outside of the sheet metal'memher in order to establish independent communication between the upper and lower in- .terior portions of the tank. Heretofore, it has been impossible to construct a tank of this general character having. a cast body portion integral with a cast base and a cast crown because of the difficulty in maintaining the tubes in proper positions during the casting operation. Moreover, difficulty has been experienced in insuring tight joints between a pipe and a ca'stli'ron portion of the structure. v

It is the purpose of my invention to rovide a simple means whereby a casing o the aforementioned type may be constructed in which the main body portion may be cast integral with the east end portions comprising the base and the crown of the tank.

Another object of my invention is to provide means whereby a permanently tight joint may be insured between a tubular and partially in section, of a portion ofla casing, in this instance a transformer casing which embodies a form of my invention; Fig. 2'is a view, partially in plan-and partially in section, of the casing shown in'Fig. l, and Fig. 3 is a top view of. a device used in the construction of my casing.

Referring to' Fig. 1, a transformer 1,

having a magnetizable core member 2, a

supporting frame 3 therefor and-a currentcarrying winding 4, is inclosed in a fluidc'ontammg tank 5 to which itis secured by suitable means (not shown). The tank 5 comprises a main body portion 6, a base 7 and a crown 8, all of which may constitute integral parts of a single casting. The body .portion may ,be of any suitable shape, the

base and crown having materially larger lateral dimensions to project'beyond the walls of the body portion. A plurality of tubes 9, which are preferably of wrought iron, constitute means for independent communication between the chambers provided by the base 7 and the crown 8. a t

I- have shown the tubes 9 disposed in groups which are spaced apart and occupy One'method ofconstructing a casing embodying'myinvention is explained herewith.

The tubes comprisingieach group are con nected at each extremity to a plate 10 which is provided with openingsll through which the tubes project. The plate 10 is secured to each tube by a continuous autogenousjoint formed along the outer circumference of'the tube by any well known means, such as brazing, welding, etc. The groups of tubesmay be then. properly positioned. relative to the mold and the casting operation may be completed. By means of this type of construction, the plates 10 are secured to cast base 7 and the cast crown 8, and continuous unions are formed between the tubes 9 and the crown and base portions. Inasmuch as the edges ofthe plates 10 are embedded in the cast portions of the tank, as shown in Fig. 1, assurance is had that no oil will leak from the tank by reason of faulty joints between the cast portion and the steel plate 10, because it is comparatively easy to obtain continuous and efi'ective joints when casting two The transformer is immersed in oil or other insulating fluid 12, and the heat produced by the current traversing the Winding of the transformer establishes a circulation of insulating fluid through the bodv portion (5 in onedirection and back through the tubes 9, since the large radiating surface of the tubes 9 tends to keep the liquid at a lower temperature. than that which exists within the transformer Winding 4:.

it apparent that the joints formed by the heading of the tubes 9 into the chambers provided by the base 7 and the crown -8 should preclude the outflow of the insulating fluid 12 from the tank. In the structure described, the oil is prevented from flowing from the containing case, and adequate circulation thereof is permitted to maintain the v.temperature of the transformer 1 at a value.

While I have explained in detail my invention as applied to a transformer tank, it will be understood that the invention may apply to casings other than those made entirely of cast metal and to all casings or structures Which may be subjected to conditions similar'to those of transformer casings.

I claim as my invention:

1. A fluid-containing" casing" for electril ap aratus con'iprising a cast iron body members. plates cast in the end ibcrs and provided With openings, and -.s projecting through the openings and 4e .ured to the plates by continuous autog- -ous joints, said tubes establishing auxil- ..ar v communication between the chambers firmed by the said end members.

2 A fluid-containing casing for electrical apparatus comprising acast iron tank, plates provided With openings cast in at each extremity of thetank, and tubes projecting through the said openings and secured to the .plates by continuous autogrenous joints.

3. A fluid-containing casing for electrical apparatus comprising a cast iron tank,

plates cast in the end portions of the tank, and tubes located outside the body portion of the tank and connecting}, its end portions to provide the circulation of liquid therethrough, said tubes secured to the said plates by continuous autogenous joints.

4. The combination with a transformer, of a fluid-containing casing therefor, said casing comprising a cast iron body portion and end members cast integral therewith, plates cast in the end members, and tubes secured to the plates by continuous autogenous joints, said tubes being disposed about the body portion and headed into the chain bers provided by the end members for establishing independent communication therebetween.

A casing comprising a cast iron portion, an apertured plate cast into said portion, and a tube projecting through an aperture in said plate and secured to the plate by a continuous autogenous joint.

6. A casing comprising: cast iron end poltions, apertured plates cast into said portions, and a tubular 'n'ielnber projecting through apertures in said plates and secured to the plates by continuous autogenous joints.

7. A casing comprising a cast iron tank, an' apertured plate cast into said tank, the openings in said plate being unobstructed, and a tubular member projecting through an aperture in the plate and secured to the plate by a continuous autogenous joint.

8. A. casing comprising" a cast iron portion, spaced apertured plates cast into said cast portions, the openings in said plates being unobstructed. and a tubular member projecting through apertures in said plates and secured to the plates by continuous autogenous joints.

9. A casing comprising cast iron end portion's, apertured plates cast into the end portions, and a tubular member projecting; through apertures in said plates and secured to the plates by continuous autogenous joints, said iii-ember establishing communication between remote portions of the chamber inclosed by the casing.

in testunony \xhereof, I have hereunto subscribed my name this 31st day of ()ct., 1913.

' EMERSON REED.

lVitnesses:

J. B. Ginns,

B. HiNns. 

